最新刊期
- 摘要：YAG：Ce （Y3Al5O12：Ce） phosphor ceramics serve as vital blue-light conversion materials for solid-state lighting devices. Co-doping with Mn2+ ions can effectively supplement orange-red light component and enhance color rendering performance. Nevertheless， YAG：Ce，Mn phosphor ceramics still suffer from reduced luminescence intensity and thermal stability. In this study， YAG：Ce，Mn powders synthesized via solid-state reaction and commercial α-Al2O3 powders were adopted as raw materials. x wt% Al2O3-YAG：Ce，Mn （x=0， 30， 50， 70） composite phosphor ceramics were prepared by vacuum sintering. The two phases are uniformly distributed， containing Al2O3 grains with small size （~3 μm） and large size （~10 μm）， while the average grain size of YAG phase is ~7 μm. The introduction of high thermal conductivity Al2O3 secondary phase as scattering centers markedly improves the luminescence intensity and thermal stability of Al2O3-YAG：Ce，Mn composite phosphor ceramics. Al2O3 grains with small size comparable to visible‑light wavelength will exhibit higher scattering efficiency. The sizes of both small and large Al2O3 grains are much larger than the mean free path of heat‑transport phonons， enabling full utilization of the high thermal‑conductivity advantage of Al2O3. Compared with YAG：Ce，Mn phosphor ceramics， the integrated photoluminescence intensity and thermal conductivity of 50 wt% Al2O3-YAG：Ce，Mn composite phosphor ceramics rise to 5.0 times and 2.1 times， respectively. The retention rate of luminescence intensity at 225 °C increases from 70% to 78%. A white light prototype device assembled with 50 wt% Al₂O₃-YAG：Ce，Mn composite phosphor ceramics and blue LED chip achieves a color rendering index of 84.7， a correlated color temperature of 6312 K and a luminous efficacy of 113.4 lm/W， which is much higher than 27.4 lm/W of YAG：Ce，Mn phosphor ceramic. Under blue laser irradiation， the blue light absorption and blue to yellow-orange light conversion efficiencies of 50 wt% Al2O3-YAG：Ce，Mn composite phosphor ceramics are elevated. The saturation power density， saturated luminous flux and luminous efficiency increase from 9.59 W/mm2， 233.9 lm and 44.4 lm/W@1.17 W/mm2 for YAG：Ce，Mn phosphor ceramics to 17.64 W/mm2， 1279.8 lm and 132.5 lm/W@1.17 W/mm2 correspondingly for 50 wt% Al2O3-YAG：Ce，Mn composite phosphor ceramics. The Al2O3-YAG：Ce，Mn composite phosphor ceramics possess promising application potential in high quality solid-state lighting.关键词：composite phosphor ceramics;YAG：Ce，Mn;Al2O3 secondary phase;solid-state lighting3|0|0更新时间：2026-10-16
- 摘要：In recent years， the rapid development of silicon-based photodetectors represented by photomultiplier tubes and silicon photodiodes， which feature high detection efficiency and long-wavelength sensitivity， has drawn considerable attention to scintillation crystal materials with red to near-infrared （NIR） luminescence properties. Millimeter-scale Mo4+-doped Cs2ZrCl6 NIR scintillation crystals were successfully prepared via a hydrothermal method. Based on the perovskite-type halide Cs2ZrCl6， broadband NIR emission centered at 980 nm with a full width at half maximum （FWHM） of approximately 194 nm was achieved through Mo4+ doping. Compared with the undoped sample， the introduction of Mo4+ resulted in a series of distinct new absorption peaks in the 270–850 nm range， which， based on the analysis of room-temperature absorption spectra， can be attributed to the combined effects of the 3T1g → 1T2g/1Eg， 3T1g → 3T2g， and 3T1g → 3T1g（P） transitions of Mo4+. Flexible NIR scintillation films were fabricated by compositing this material with PDMS， enabling X-ray imaging of the internal spring and chip structures of capsules. Furthermore， NIR pc-LED devices were constructed， demonstrating potential applications in non-destructive detection of fruit bruises， night vision， and arm and finger vein imaging. This work provides a valuable reference for achieving NIR luminescent materials through Mo4+ doping关键词：Mo4+ doping;Cs2ZrCl6;NIR scintillation crystals;X-ray imaging8|9|0更新时间：2026-10-13
- 摘要：Currently， the performance improvement of conventional GaN LED faces several bottlenecks， such as efficiency droop and poor p-type GaN contact. This work proposes a Ga-polar GaN-based inverted LED structure with tunnel junction （TJ-Inversion LED）， where the p-type layer is placed below the n-type layer. Compared with conventional Ga-polar GaN LED， the TJ-Inversion LED shows a 64% increase in light output power， a maximum internal quantum efficiency of 67.8%， and only a 5.6% reduction in droop effect at 400 A/cm². Simulation results indicate that by reversing the current flow direction， the TJ-Inversion LED makes the applied electric field opposite to the polarization field， thereby reducing the electric field in the quantum wells， enhancing the electron-hole wavefunction overlap and the radiative recombination rate， as well as effectively alleviating the efficiency droop caused by strong polarization fields. This work provides a new approach for the design of high-performance GaN-based LEDs.关键词：GaN;Ga-polar;inversion LED;tunnel junction34|24|0更新时间：2026-10-13
- 摘要：Nucleoside monophosphates （NMPs） play pivotal roles in energy metabolism and genetic information transfer， yet their specific discrimination from di- and triphosphates is difficult by conventional fluorescence methods due to structural similarity. Here， coordination polymer nanoparticles （CPNs） assembled from four nucleosides at varying phosphorylation levels （0-3） with Tb3+/Ag+ were constructed， and their fluorescence and circularly polarized luminescence （CPL） properties were systematically investigated. All CPNs exhibit characteristic green emission of Tb3+， and the fluorescence spectra are nearly identical across different phosphorylation states， thus precluding simple fluorescence-based differentiation. In contrast， CPL spectra show high selectivity， only assemblies from NMPs display distinct CPL signals at 545 nm， a trend that holds for all four nucleobase types. Furthermore， the CPNs were fabricated into flexible PVA films， preserving their CPL properties， and they exhibits good printability and time stability. These findings demonstrate that CPL can serve as an encrypted signal beyond fluorescence， enabling specific recognition of NMPs in single-component aqueous systems， offering new perspectives for chiral luminescent materials in anti‑counterfeiting and information encryption.关键词：circularly polarized luminescence;nucleoside monophosphate;lanthanide metal;chirality;selective recognition22|29|0更新时间：2026-10-10
- 摘要：The unique temperature response behavior of rare earth ion co-doped fluorescent materials provides an important material foundation for constructing non-contact optical temperature sensors， and energy competition and co-regulation between different emission centers are key to achieving highly sensitive temperature responses. This paper uses high-temperature solid-phase methods to prepare a series of BaGd2ZnO5：Ho3+，Eu3+ phosphors， and systematically studies their structure， photoluminescence， and temperature response characteristics. X-ray diffraction and scanning electron microscopy results show that after co-doping with Ho3+ and Eu3+， the samples still maintain a good orthorhombic crystal structure crystal phase structure. Spectral studies show that Ho3+ and Eu3+ can produce characteristic green and red light emission at 544 nm and 628 nm in BaGd2ZnO5， respectively. By adjusting Eu3+ concentration， the energy transfer efficiency of Ho3+→ Eu3+ can be changed， achieving a shift in luminescence color from green to red. Meanwhile， fluorescence lifetime analysis confirmed the energy transfer process of Ho3+→Eu3+. Temperature-dependent emission spectra in the -196~250 °C range showed that Ho3+ and Eu3+ exhibited significantly differentiated temperature responses： as temperature increased， Eu3+ red emission continued thermal quenching， while Ho3+ green emission showed anomalous thermal enhancement within certain temperature ranges， indicating temperature-dependent energy competition and redistribution in the co-doping system. Based on the distinct thermal response difference between Ho3+ and Eu3+ luminescence， a fluorescence intensity ratio thermometric strategy was constructed， and the optimal relative sensitivity of this system reaches 1.744% K-1（123 K）. The above results indicate that the BaGd2ZnO5：Ho3+，Eu3+ system achieves luminescence color regulation through energy transfer between rare earth ions， and utilizes the differentiated temperature response characteristics of different emission centers to construct stable， quantifiable ratio optical temperature sensing signals， providing a feasible strategy for multicolor luminescence regulation and highly sensitive non-contact optical temperature measurement for rare earth co-doped fluorescent materials.关键词：BaGd2ZnO5：Ho3+/Eu3+;luminescence adjustment;anti-thermal quenching;energy transfer;optical temperature sensing13|26|0更新时间：2026-10-10
- 摘要：Low-dose X-ray imaging imposes stringent requirements on scintillating materials in terms of X-ray absorption capability， luminescence efficiency， thermal stability and dose-response performance. Accordingly， developing oxide scintillators with comprehensive outstanding properties is of great significance. Rare-earth-ion-doped garnet materials have attracted extensive attention owing to their rigid crystal framework and favorable chemical stability. In this work， a series of garnet luminescent materials Lu1-xTbxCaMgAl3Ge2O12 were synthesized via the high-temperature solid-state reaction method. The optimal doping concentration was explored， and the influences of Tb3+ doping content on luminescence and X-ray response properties were systematically investigated. The optimized material Lu0.8CaMgAl3Ge2O12：0.2Tb3+ exhibits prominent green-light emission， retaining approximately 90 % of its room-temperature luminescence intensity at 423 K. Moreover， its X-ray signal-to-noise ratio shows satisfactory linear correlation with dose rate， and the estimated detection limit reaches 0.41 μGyair·s-1. This study provides experimental support for the development of candidate materials toward low-dose X-ray detection.关键词：Garnet;Tb3+ doping;concentration quenching;X-ray excited luminescence;low-dose detection66|41|0更新时间：2026-10-10
-
3D-Printed CsPbX3 Quantum-Dot Nanoporous Glass and the Application in White Light-Emitting Diodes 增强出版 AI导读
摘要：All-inorganic CsPbX3 perovskite quantum dots （QDs） are promising color-conversion materials for white light-emitting diodes （WLEDs） owing to their narrow-band emission， tunable wavelengths， and high photoluminescence quantum yields. However， their solid-state stability and spatial integration of multicolor emissive components remain challenging. Herein， digital light processing （DLP） 3D printing was combined with confined in-pore growth to fabricate three-dimensional CsPbX3 QD nanoporous glass composites and evaluate their applicability as WLED color-conversion layers. Pb2+-doped nanoporous glass architectures were first fabricated by DLP printing， followed by CsX solution infiltration and in-pore reaction to form CsPbX3 QDs. The nanoporous glass provides spatial confinement for QD growth， while interfacial electronic interactions between the QDs and oxygen-containing silicate pore walls may regulate the local chemical environment and improve QD stability. Halide composition enabled broad emission tuning from 470 to 650 nm， whereas pore-size modulation afforded further spectral refinement. Green-emitting CsPbBr3 and red-emitting CsPbBr1.8I1.2 QD glass components were subsequently integrated with a blue LED chip to produce a stable WLED with CIE 1931 chromaticity coordinates of （0.305， 0.338）. The device maintained good operational stability over 120 h of continuous operation. These results demonstrate that DLP-printed nanoporous glass can function as both a QD confinement host and a structurally defined color-conversion component， offering a feasible route toward the spatial integration of multicolor perovskite QDs and the construction of WLEDs.关键词：3D printing;nanoporous glass;perovskite quantum dots;emission tuning;white light-emitting diode121|48|0更新时间：2026-09-28 - 摘要：Nonlinear optics serves as a core driving force for the development of modern optics. Second harmonic generation （SHG）， as the most classic nonlinear optical process， imposes stringent requirements on the non-centrosymmetric structure of materials. Chiral hybrid metal halide materials， which combine structural tunability， intrinsic chirality， and excellent optoelectronic properties， provide a new platform to overcome the limitations of traditional SHG materials. This review starts from the fundamental principles and performance metrics of nonlinear optics， and systematically summarizes the research progress of chiral hybrid metal halide materials in nonlinear optics. It focuses on the synthesis， regulation， and characterization of these materials. Finally， the current status and challenges in the application and fabrication of chiral perovskite materials are analyzed， along with an outlook on future directions.关键词：nonlinear optics;chiral hybrid metal halide materials;second harmonic generation （SHG）;molecular engineering76|69|0更新时间：2026-09-16
- 摘要：The mid-infrared spectral band （2-12 μm） covers the characteristic absorption peaks of numerous molecules and is known as the “molecular fingerprint region”. It holds irreplaceable strategic value in environmental monitoring， biomedical diagnostics， space communications， and national defense security. Semiconductor optical amplifiers （SOA）， as core active devices in mid-infrared photonic systems， have become key technology carriers for mid-infrared light source power amplification and signal processing， owing to their compact structure， high electro-optical conversion efficiency， large gain bandwidth， and excellent integrability. This paper first describes the research background and development history of mid-infrared SOA. Then， classified by gain medium material systems， it systematically reviews the research progress of InP-based， GaSb-based， and other novel mid-infrared SOA including CdTe-based， ZnS/ZnSe-based， and InAs-based devices. The working principles， device structures， gain characteristics， integration schemes， and application limitations of different gain media are analyzed in depth. Finally， the technical development trends and future research directions of mid-infrared SOA are prospected， aiming to provide theoretical references for device selection and technological innovation in mid-infrared photonic systems.关键词：mid-infrared;semiconductor optical amplifier;InP-based;GaSb-based;quantum cascade50|62|0更新时间：2026-09-15
- 摘要：Light-emitting-diode （LED） plant‑growth luminaires provide a stable， necessary light environment for crop cultivation in plant factories. However， there is currently a mismatch between the emission spectrum of the phosphors used in the plant growth light and the spectrum required for photosynthesis. To develop LED light-source to meet the full-spectral requirements for plant growth， this work selects K2CaPO4F with multiple cation sites as the matrix and Eu2+ as the activator， and adopts stepwise doping with B3+ and Ba2+ for modification， obtaining a full-spectrum emitting phosphor. The target emission spectrum covers the full visible range and dominates both red and blue bands， which resembles the relative photosynthetic efficiency curve （Hoover curve） distributed consistently. We systematically study the phase structure， photoluminescent properties， and spectral regulation mechanism， and conduct LED device assembly and planting application experiments. The initial K2CaPO4F：Eu2+ phosphor shows a dual-band emission with a cyan band peaked at 490 nm and a red band peaked at 655 nm. Firstly， B3+ is introduced by mainly replacing the ［PO4］ group with ［BO4］ structural units， causing local crystal distortion and increasing the occupancy probability of Eu2+ at the ［CaO4F2］ site. As a result， the red emission intensity of K2CaPO4F：Eu2+， xB3+ significantly enhances than the initial composition. When the B3+ addition amount （x） reaches 0.15， the red emission intensity is enhanced by 1.69 times. Thereafter， Ba2+ is adopted to replace Ca2+. When the amount of Ba2+ （y） is ≤ 0.1， it forms a solid solution， where the cyan emission shows slight blue shift. When y ≥ 0.15， a K2CaPO4F–K2BaPO4F composite phase is formed and a new blue emission band around 440 nm originated from K2BaPO4F：Eu2+ appears， promoting the relative intensity ratio distribution of the full-spectrum of the composite phosphor to be highly consistent with the required spectrum for plant growth. The optimal sample is fabricated into an LED module for plant growth lighting， and its emission spectrum is highly consistent with the Hoover curve. The lettuce cultivation experiment proves that this light source can ensure the normal growth of lettuce and meet the indoor cultivation light requirements.关键词：phosphor;Eu2+ doped;LED;full spectrum;plant growth lighting102|35|0更新时间：2026-09-14
- 摘要：Circularly polarized luminescence （CPL） materials have drawn great attention， owing to their great potential in AR/VR， 3D flexible displays， imaging and sensing， advanced anti-counterfeiting and encryption. Cholesteric liquid crystal polymer network （CLCN） films， integrating the quasi-one-dimensional supramolecular helical structure of cholesteric liquid crystals with the excellent properties of polymer films， are suitable for constructing high-performance CPL materials. In this review， we first outline the fundamental concepts of CPL， key parameters， and optical characteristics of cholesteric liquid crystals. Then， the preparation methods and essential characterization techniques are given. Subsequently， the strategies for regulating CPL performance via chiral dopant selection， dye engineering， and multilayer stacking approaches are discussed. CLCN films can significantly amplify CPL signals. Nevertheless， they currently face challenges in improving preparation processes and CPL performance. Driven by their unique structure and the continuous elevation， these materials hold immense promise for future development.关键词：circularly polarized luminescence;cholesteric liquid crystals;polymer network films;selective reflection62|58|0更新时间：2026-09-14
- 摘要：Barium titanate （BaTiO3）， a classic perovskite-type ferroelectric， has attracted significant attention due to its excellent dielectric constant， pronounced nonlinear piezoelectric and ferroelectric effects， and tunable phase transition characteristics. It finds important applications in multilayer ceramic capacitors， thermistors， memories， and electro-optic devices. In this work， a series of Er3+-doped BaTiO3 ceramics （doping concentration： 0.5 mol%） with different calcination temperatures （1250 °C， 1300 °C， and 1350 °C） were prepared via a high-temperature solid-state reaction method， by adjusting the Ba/Ti feeding ratio （creating Ba-site excess and Ti-site excess， respectively）. The samples were systematically characterized using X-ray diffraction （XRD）， Raman spectroscopy， scanning electron microscopy （SEM）， and temperature-dependent photoluminescence spectroscopy. The results indicate that the sample with Ba-site excess calcined at 1300 °C （B1300Er） exhibits the best temperature sensing performance. In the ferroelectric phase transition temperature region of BaTiO3 （270-290 K）， a significant abrupt change in fluorescence intensity is observed， which can serve as an optical fingerprint signal for the phase transition， enabling in-situ and precise detection of the phase transition. The absolute sensitivities of the B1300Er and T1300Er samples show little difference in the low-temperature range but differ significantly in the high-temperature range. At 400 K， the absolute sensitivity of B1300Er reaches 0.00413 K-1， which is 40% higher than that of T1300Er， consistent with the theoretical expectation that the Ba-site doping configuration yields a larger thermally coupled energy gap （ΔE）. Fluorescence lifetime analysis reveals the presence of two distinct luminescence microenvironments in the samples， and the long-lifetime component is more sensitive to temperature changes， being a key microstructural factor for improving the FIR thermometry sensitivity. This study integrates the thermally coupled fluorescence intensity ratio （FIR） based wide-range thermometry of Er3+ with in-situ optical detection of the BaTiO3 ferroelectric phase transition into a single ceramic system， constructing a dual-function optical sensing platform capable of both continuous temperature measurement and phase transition perception. This work provides experimental evidence and a new strategy for the multifunctional design of perovskite-based rare-earth-doped optical temperature sensors.关键词：rare earth luminescence;Er3+ doping;BaTiO3;optical thermometry;fluorescence intensity ratio;Phase transition detection504|123|0更新时间：2026-09-10
- 摘要：Compared with conventional Nd-doped garnet crystals， Nd-doped garnet crystals with multiple cation occupations and local crystal-field variations are favorable for the inhomogeneous broadening of Nd3+ emission spectra， thereby providing a basis for long-wavelength laser operation in the 1 μm region and subsequent visible frequency conversion. In this work， long-wavelength fundamental laser output at 1112 nm was realized based on an Nd：Gd3Sc2Al3O12 （Nd：GSAG） crystal， and yellow-green laser output at approximately 557 nm was obtained by intracavity frequency doubling with an LBO crystal. Without the nonlinear crystal inserted into the cavity， a maximum fundamental output power of 1.501 W at 1112 nm was achieved. After the Type-I phase-matched LBO crystal was introduced， a maximum yellow-green output power of 2.3 mW was obtained， with the dominant spectral peak located near 557 nm. These results verify the feasibility of long-wavelength fundamental oscillation above 1100 nm in Nd-doped crystals and its direct frequency doubling for yellow-green laser generation. Further improvement of the yellow-green laser output performance in this spectral region is expected through optimization of cavity mirror coatings， reduction of insertion loss from the nonlinear crystal， and improvement of intracavity mode matching.关键词：Nd crystal;LBO crystal;1112 nm laser;intracavity frequency doubling;yellow-green laser61|49|0更新时间：2026-09-10
- 摘要：Stable organic radical emitters hold promise for achieving 100% internal quantum efficiency in electroluminescence； however， the molecular design space of high-performance radical emitters remains largely unexplored， and the structure–property relationships that govern their luminescence efficiency require further elucidation. In this work， two structurally similar organic radicals， TTM-1Cz and TTM-DACz， which exhibit markedly different photoluminescence quantum yields （PLQYs）， are systematically investigated using time-dependent density functional theory coupled with the polarizable continuum model. A comprehensive comparison of their absorption and emission spectra， first excited state （D₁） energy barriers， electron–hole orbital overlap， and radiative and non-radiative rates is performed to unravel the microscopic mechanism underlying their distinct emission efficiencies. The calculations reveal that both molecules feature charge-transfer characteristics in their D₁. The nitrogen substitution in TTM-DACz significantly raises the D₁ conformational isomerization barrier， effectively restricting the twisting of the donor–acceptor dihedral angle and preserving a more planar molecular conformation in the excited state. This planarized geometry enhances the spatial overlap between electron and hole orbitals， thereby promoting the radiative decay rate. Furthermore， the estimated torsional relaxation times are approximately 19 ns for TTM-DACz and 1.7 ps for TTM-1Cz； the ultrafast torsional relaxation of TTM-1Cz provides an efficient non-radiative dissipation channel. Quantitative calculations show that TTM-DACz exhibits a higher radiative rate （
- 摘要：Benefiting from ultra-low background noise due to atmospheric ozone absorption， solar blind photodetectors have broad application values in military and civilian fields. However， traditional solar-blind UV photodetectors still face the challenge of weak incident optical signals in practical applications. In this work， Si/Ga2O3/NiO heterojunction bipolar phototransistors （HBPT） were fabricated on Si substrates with Si， Ga2O3 and NiO serving as the collector， base and emitter， respectively. X-ray diffraction （XRD） and atomic force microscopy （AFM） characterizations indicated that Ga2O3 films prepared on Si substrates by metal-organic chemical vapor deposition （MOCVD） were polycrystalline with a flat surface， following the Volmer–Weber growth mode while NiO films deposited on Ga2O3 by radio‑frequency magnetron sputtering presented an amorphous structure with a rough surface . Under 254 nm illumination at an intensity of 200 μW/cm2 and an operating bias of 15 V， the device achieved a responsivity of up to 4 × 103 A/W and an external quantum efficiency as high as 1.9 × 106%， demonstrating efficient detection capability for weak solar-blind ultraviolet signals. Owing to the inherent internal amplification of the bipolar phototransistor architecture， the fabricated heterojunction phototransistor provided a new strategy for the construction of Ga2O3‑based solar blind ultraviolet photodetectors.关键词：MOCVD;Ga2O3;Solar-blind ultraviolet detection;heterojunction bipolar phototransistor;Si substrate71|44|0更新时间：2026-09-08
- 摘要：CsPbBr3 perovskite quantum dots （QDs） exhibit tremendous application potential in quantum dot light-emitting diodes （QLEDs） owing to their narrow emission， high color purity， and high quantum yield. However， conventional PEDOT：PSS hole injection layers suffer from strong acidity， rough morphology， energy level mismatch， and unbalanced carrier injection， which severely restrict the luminescence performance of the devices. In this study， PSSNa and metal bromides （CuBr2， NiBr2， LiBr） are utilized for the binary synergistic doping of PEDOT：PSS to regulate film morphology， effectively passivate interfacial defects， optimize energy level alignment， and balance carrier transport. Morphological characterization results indicate that binary doping improves the film’s density， promotes the uniform distribution and orderly arrangement of quantum dots， reduces nonradiative recombination losses， and lowers the hole injection barrier. Device performance evaluations demonstrate that the modified QLEDs present a decreased turn-on voltage along with significantly enhanced luminance and efficiency. Notably， the NiBr2-doped device delivers the optimal performance， achieving a peak external quantum efficiency （EQE） of 9.78%， which is 2.2 times that of the pristine device. This work provides an effective strategy for the modification of hole injection layers in perovskite QLEDs.关键词：perovskite quantum dots;PEDOT：PSS;binary synergistic doping;hole injection layer66|64|0更新时间：2026-09-08
- 摘要：Transition metal ion-doped lead-free halide double perovskites feature a lead-free， environmentally benign composition， high structural flexibility， and broad spectral tunability， and have emerged as a pivotal research direction for next-generation high-efficiency near-infrared （NIR） luminescent materials. This review systematically summarizes the research progress on NIR luminescence in transition metal ion-doped halide double perovskites. First， the crystal structures and fundamental optical properties of metal halide double perovskites are elucidated. Subsequently， the luminescence mechanisms， spectral characteristics， and recent advances of d3 and d2 electronic configuration systems in halide double perovskites are elaborated in detail. Then， three performance optimization strategies， compositional substitution engineering， energy transfer， and valence state regulation， are summarized along with their underlying mechanisms. Afterwards， typical applications of these NIR luminescent materials in biological imaging， night-vision illumination， and non-destructive testing are introduced. Finally， the challenges confronting current research are analyzed， and outlooks for future development directions are proposed， aiming to provide references for the rational design and application expansion of high-efficiency NIR luminescent materials.关键词：transition metal ions;Metal halide double perovskites;NIR luminescence;performance regulation178|87|0更新时间：2026-09-08
- 摘要：Real-time sensing and visual expression of environmental humidity information are of great significance for intelligent environmental monitoring. However， conventional humidity sensors generally rely on humidity-induced variations in electrical parameters for detection and require additional signal processing and display modules for information feedback， which limits the integration of humidity sensing and visual presentation. In this work， a Humidity-responsive Triboelectric Nanogenerator （H-TENG） was constructed using NaCl/PVA as the humidity-responsive triboelectric layer. Combined with LiY6O5（BO3）3：Bi3+， Eu2+， Eu3+ phosphor ， a self-powered white-light LED was fabricated to investigate the regulation of environmental humidity on triboelectric generation and LED emission performance. The results demonstrate that the phosphor achieves stable white-light emission under 340 nm near-ultraviolet excitation through the synergistic luminescence of Bi3+， Eu2+ and Eu3+. The differences in the electrical output of the H-TENG under different humidity conditions were further utilized to regulate the emission state of the white-light LED. Under different humidity conditions， the device maintains essentially consistent white-light spectral characteristics while exhibiting distinguishable differences in emission intensity. As the environmental humidity increases， the electrical output of the H-TENG gradually decreases， thereby enabling the visual indication of different environmental humidity states. This study provides a new approach for the optical visualization of humidity sensing information.关键词：humidity sensor;TENG;WLED;phosphor81|44|0更新时间：2026-09-08
- 摘要：Near-infrared circularly polarized luminescence （NIR-CPL） materials offer the dual advantages of deep tissue penetration and high information capacity， holding great potential for application in optical anti-counterfeiting， data encryption， bioimaging and optical devices. However， existing materials suffer from low luminescence asymmetry factors that are difficult to tune， which limits their practical application. To address this challenge， this paper reports a high-performance NIR-CPL system based on cholesteric liquid crystal elastomers （CLCEs）. By incorporating near-infrared luminescent molecules into CLCEs， a photonic bandgap is formed via the periodic helical structure of the CLCEs， enabling continuous control over the photonic bandgap position. Notably， when the photonic bandgap closely matches the emission peak of the NIR luminescent molecules， circularly polarized luminescence is significantly enhanced， yielding a maximum asymmetry factor （glum） of 0.3. This study not only provides a simple and effective strategy for developing high-performance NIR-CPL materials， but also establishes a material foundation for advanced applications in cancer detection and multi-level information encryption.关键词：near-infrared luminescence;circularly polarized luminescence;cholesteric liquid crystal elastomer;photonic bandgap97|79|0更新时间：2026-09-03
- 摘要：Mechanoluminescent materials are capable of converting input mechanical stimuli into photon emission， offering substantial promise for smart wearables， structural health monitoring， biomechanical imaging， and optoelectronic anti-counterfeiting. Advanced characterization techniques provide the measurements needed to reveal the structure–property relationships and physical mechanisms， guide materials design， and assess engineering applicability. Here， we review recent advances in the characterization of mechanoluminescent materials. We first introduce conventional mechanical loading platforms， including universal testing machines， drop-ball impact systems， rotary motors， and linear motors， together with optoelectronic signal-acquisition and system-integration modules. We then focus on the advanced characterization techniques， including transient-response measurements， single-particle characterization， in situ high-pressure characterization， and ultrasound-induced mechanoluminescence， and discuss their underlying principles， applicability， and technical advantages. Finally， we summarize current challenges related to synchronized multiphysics measurements， spatiotemporal resolution， monitoring under practical operating conditions， and high-throughput intelligent characterization， and outline future research directions.关键词：mechanoluminescence;Advanced characterization techniques;Mechanoluminescence efficiency;Transient mechanoluminescence119|141|0更新时间：2026-09-03
- Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China Postal code：130033
- Tel：0431-86176862 Email：fgxbt@126.com
- Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0